Drilling system for insertion of an endoprosthesis

Abstract

Drill system for an endoprosthesis including a drill gauge composed of: a straight, stem-like shaft and a guide element provided with a through bore for a drill, the guide element being connected with the stem-like shaft and the bore being oriented at an angle with respect to the shaft. The axes of shaft and bore essentially intersect and the guide element is fixed to the cylindrical, stem-like shaft.

What is claimed is: 
     
       1. Drill system for the insertion of an endoprosthesis within a bone including a drill gauge comprising; a cylindrical, stem-like shaft having a recess, and   a guide element provided with a through bore for accommodating a cutter, said guide element being fixed to said shaft, the bore being oriented at an angle with respect to said shaft and the axes of said shaft and said cutter within the bore essentially intersect;   wherein said recess is located on said shaft where said shaft and said cutter intersect, said recess delimiting the path of said cutter in the direction toward said shaft by way of a transversely extending surface.   
     
     
       2. Drill system as defined in claim 1 wherein the cylindrical shaft (3) and the bore (8) of the guide element (4) are matched in diameter in such a manner that the shaft is guided essentially without play in an opening in the bone, said opening having been produced by means of said cutter which itself is guided by the bore essentially without play. 
     
     
       3. Drill system as defined in claim 1, wherein the diameter of the bore (8) is equal to or slightly larger than the diameter of the shaft (3). 
     
     
       4. Drill system as defined in claim 1, wherein, on the side of the guide element where the axes of said shaft and bore intersect, the drill gauge guide element (4) provided with the bore (8) has an abutment face, the surface of said abutment face falling essentially into the plane defined by the center axes of the shaft and the bore. 
     
     
       5. Drill system as defined in claim 1, wherein, the end of said shaft extending from said bone, is provided with a handle. 
     
     
       6. Drill system as defined in claim 5, wherein the end of the handle is bent, with the bend increasingly moving away from the axis of the bore. 
     
     
       7. Drill system as defined in claim 5, wherein the handle (11) is removable. 
     
     
       8. Drill system as defined in claim 5, wherein the handle (11) is connected with the shaft by means of a screw cap sleeve (12) and a quick-release coupling including a moment-locking plug-in connection. 
     
     
       9. Drill system as defined in claim 1, wherein the cross section of the cutter for excavating the bone material is adapted to the bore in the drill gauge guide element (4).